Lightcache very low

[priad]

Sometime I don't understand, my lightcache is very very low , nothing special in the scene.
Is someone know a issue with this?
Is there something (mtl, setting,scale) which could block the LC
Thanks

[jacksc02]

is the lc file small? or is the level of light low?

[priad]

Thanks Jack02 for the reply, llightcache is 4.8 Mo.
What do you mean by level of light?

[DaForce]

what do you mean by very very low?? the MB (Mo for you ) size of the light cache
Or its light level... brightness...

[priad]

I speak about lightcache prepass. and very slow (for me ) is near 5 min with 1000 subdiv and a low irmap setting. (to make preview)
In 1000/750pix.

[Da_elf]

oooooooooooooh. he forgot a s in slow. now the topic makes a heck of alot more sence

[priad]

humhum.....

[RErender]

do you have a lot of displacement?

very bright or white materials can slow it down too because they will cause the rays to bounce a lot more.

[priad]

no displacement, and I have already checked the pure white mtl.
Does transparency could be the cause of that? I have lot of glass mtl.

[DaForce]

quite possibly.

Is it a lot of layered glass? like glass behind glass behind glass?

[dejaVu]

check the size of your maps.
large textures will cause very slow LC prepass calcs.

You can also try unchecking the Show Calc Phase.